Mechanically speaking, I can't say I love this combination. It seems to me that you're going to be spread thin on stats. You'll need Wis, Cha, and Con, at minimum. Your Dex is going to suffer, which is going to hurt your AC and initiative.
Further, you'll primarily be a spellcaster, but you're going to have a hard time getting both your Wis and Cha as high as you'd like. You'll probably be forced to choose one of those stats to excel in, leaving the other one slightly lower, which means one of your classes is going to be more for utility.
Also, despite being a full spellcaster in both classes, you'll be giving up higher level spells, although I don't think that's *so* bad considering the strength of what you're getting in return. Light Cleric and Lore Bard both have some strong features early on.
So... just my opinion... if I had to make this, I would probably...
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Start Cleric. This will give you proficiency is Wis saving throws instead of Dex, which is what the Bard would get. I think in the long run, you'll value Wis more.
Ultimately, I would suggest going 6/6.
This gives you 3rd level spells in both classes.
As a cleric, you get warding flare, improved warding flare, and destroy undead. You also get access to Fireball, which is always a nice touch. Keep in mind, you can upcast this because you will have a full set of spell slots, all the way up to sixth level slots. Not too shabby.
As a bard, you get Song of Rest, Jack of all Trades, Countercharm, Cutting Words, Extra Skill Proficiencies, and Magical Secrets.
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You'll be missing out, as mentioned, on higher levels spells, but I don't think that's terrible. You'll have plenty of spell slots for upcasting Guiding Bolts and Fireballs and Spirit Guardians. You'll also be missing out on an extra feat, which going something like 8/4 would give you, but personally, I don't think the trade is worth it for the extra feat.
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For stats, I suppose I'd suggest starting with something like:
Str 8 (dump)
Dex 12
Con 14
Int 8 (dump)
Wis 16
Cha 15
Use the Hag's Hair to raise your Cha to 16 first chance you get.
For your two feats, I'd suggest the first one be to increase either your Wis or Cha by +2. The second feat could either be used for another ability increase or for Alert if you feel like your Dex is causing you to fall too far behind in initiative. Although you'll probably want to consider some of the initiative bonuses available through gear.